CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Linghong Xue,Fan Zhang,Jiale Dang,Yu Zhang,Xu Li,Tong Liu,Qingji Wang
The room temperature gas sensor has attracted sufficient attention due to the fact that low-power products are more suitable for practical environments. However, developing gas sensors with low detection limits remains challenging. In this paper, a room-temperature sensor was prepared by in situ growth of WO 3 nanospheres on SnO 2 inverse opal (IO) by aerosol assisted chemical vapor deposition (AACVD) method, detecting ppb level of ammonia. The WO 3 nanospheres are directly fabricated on IO, and their elemental composition, morphology and structure is characterized using XRD, SEM and TEM. The results show that WO 3 nanospheres have been prepared on SnO 2 IO successfully. It showes that the WO 3 /SnO 2 (WS) type sensor has a detection limit as low as 1 ppb at room temperature from the gas sensitivity data. In addition, the sensor's response value to 100 ppm NH 3 reached 65 %. Its excellent sensing performance depends on the distinctive morphology features of WO 3 and SnO 2 . The hierarchical characteristic effectively enhances the sensing performance for NH 3 . Consequently, this presents a feasible solution for fabricating the room temperature NH 3 sensor.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 7
·1-10
·
IF 2.5
Chen Wanhao,Shen Xiaowei,Huan Yunfei,Yan Chenglin,Qian Tao,Liu Xuejun
The potential application of anode-less sodium metal batteries (ALSBs) is severely affected by the irreversible depletion of sodium ions. Cathode sodium compensation (SC) additive is an effective way for sodium supplement due to its simplicity and flexibility. However, developing SC additives with no toxicity, low cost, low sensitivity to air and humidity is still a huge challenge. In this work, we propose a low-cost, environmentally friendly and air-stable organic sodium salt as sodium reservoir to compensate sodium ion, thus improving the cycle stability of ALSBs. The capacity of ALSBs with N: P as low as 0.5:1 could maintain capacity retention of 91.3% after 100 cycles with this SC additive, while the cell without this SC additive would decline to almost zero after 10 cycles. The inexpensive price and ease of preparation also make it suitable for industrialization. This work provides a realistic SC approach for improving the cycling stability for ALSBs.
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JOURNAL OF POWER SOURCES
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2024
·
IF 8.1
Chenxu Wang,LuLu Ren,Chunhua Ying,Jing Shang,John McCloy,Jin Liu,Wei-Hong Zhong
A high-performance solid electrolyte is critical for all-solid-state Li metal batteries which possess good safety and high energy densities. In this study, inspired by the unique ionic transport function and excellent adhesive properties of natural proteins, we successfully generated a novel solid electrolyte by applying soy protein as a dual-functional bridge to enable additional ion-conduction pathways and improve mechanical performance. The solid electrolyte with soy protein that interacts with both SiO 2 nanofabrics and polypolyethylene oxide (PEO) exhibits high ionic conductivity of 10 −5 S cm −1 (vs. 10 −6 S cm −1 of SiO 2 /PEO), improved Li + transference number of 0.550 (vs. 0.446 of SiO 2 /PEO), high Young's modulus of 1.862 MPa (vs. 0.356 MPa of SiO 2 /PEO) and excellent flexibility. As a result, the solid-state batteries with LiFePO 4 as cathode demonstrate a stable discharge capacity. This work provides a new strategy to advance the performance of solid electrolytes for achieving long-lifespan all-solid-state batteries.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yunpeng Wen,Xihong He,Tao Kang,Kun Gu,Si Di,Linbo Li,Yaru Cui
The efficient and sustainable metal recovery from spent Li-ion battery (LIBs) cathode materials is crucial for environmental protection and resource security. During the hydrometallurgical recovery process, the cathode materials must be separated from the current collector (Al foil) before leaching the metals. However, current separation and leaching processes are conducted separately, resulting in cumbersome process flows and significant reagent consumption. To address these issues, a ternary deep eutectic solvent (DES) composed of choline chloride, malonic acid and 2-pyrrolidone was used in this study for the simultaneous separation and leaching of LiCoO 2 cathode material. The DES achieved a separation efficiency of over 98 wt% for the cathode materials, with leaching efficiencies exceeding 96 % for Li and Co and less than 4 % for Al. The cathode material was separated from the Al foil through disruption of the molecular chains of the PVDF binder. During the leaching process, Co 3+ in LiCoO 2 was reduced to Co 2+ by malonic acid and existed in the form of [CoCl 4 ] 2- . The Li and Co in the leachate were recovered as carbonate and oxalate precipitates, respectively, allowing for the reuse of the DES after metal recovery. Solvent reusability tests indicated that the DES maintained an excellent performance after multiple cycles. This study provides a novel and environment-friendly strategy for the efficient recycling of metals from spent lithium-ion batteries.
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Defence Technology
·
2025
·
IF 5.9
Yingke Chang,Pengtao Cheng,Zhe Kong,Jianxin Nie,Wei Ren,Xiaohui Liang,Enyi Chu,Qingjie Jiao,Jianjun Luo
Initiating explosive devices (IEDs) are crucial in both military and civilian applications for improving the accuracy of controlled detonations. However, the safety of semiconductor bridge (SCB) wire IEDs, which are the most widely used, is increasingly threatened by complex electromagnetic environments. Although protective devices such as thermistors and zener diodes are commonly employed to enhance safety, traditional discrete components can compromise compactness and provide only marginal improvements. The metal-insulator transition properties of vanadium dioxide (VO 2 ) present an innovative approach to enhancing the safety performance of IEDs. Nevertheless, the functional relevance of the VO 2 phase transition in relation to IEDs has garnered limited scientific attention. The VO 2 film fabricated via 3D printing demonstrated resistivity modulation ranging from 2 to 5 orders of magnitude, achieving a stable metallic-state resistance of 1.2 Ω. The results show that this process increases the 5-minute safe current threshold by 90%, from 1 A to 1.9 A, and reduces the temperature generated by the current by approximately 40% when below the safe current threshold. Integrating VO 2 film into IEDs via semiconductor processes significantly enhances safety performance while maintaining detonation capability, demonstrating its effectiveness as a safety modulator in pyrotechnic engineering.
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Nanomaterials
·
2025
·Vol. 15
·期 2
·83
·
IF 4.3
Mingcheng Li,Zheng Liu,Dan Wu,Huihao Wu,Kuikui Xiao
Carbon is predominantly used in zinc-ion hybrid capacitors (ZIHCs) as an electrode material. Nitrogen doping and strategic design can enhance its electrochemical properties. Melamine formaldehyde resin, serving as a hard carbon precursor, synthesizes nitrogen-doped porous carbon after annealing. Incorporating transition metal catalysts like Ni, Co, and Fe alters the morphology, pore structure, graphitization degree, and nitrogen doping types/proportions. Electrochemical tests reveal a superior capacitance of 159.5 F g−1at a scan rate of 1 mV s−1and rate performance in Fe-catalyzed N-doped porous carbon (Fe-NDPC). Advanced analysis shows Fe-NDPC’s high graphitic nitrogen content and graphitization degree, boosting its electric double-layer capacitance (EDLC) and pseudocapacitance. Its abundant micro- and mesopores increase the surface area fourfold compared to non-catalyzed samples, favoring EDLC and fast electrolyte transport. This study guides catalyst application in carbon materials for supercapacitors, illuminating how catalysts influence nitrogen-doped porous carbon structure and performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jing Zhang,Dumeijin Gong,Zian Cheng,Chao Shan
The peroxone (O 3 /H 2 O 2 ) process has long suffered from inefficient performance for water decontamination at acidic pHs. Herein, we find the evident capability of trace Ce(III) to boost the acidic peroxone process. In contrast to the negligible degradation (∼6% in 60 min) of oxalic acid (OA) as a recalcitrant compound in the O 3 /H 2 O 2 system, efficient removal of OA (∼95 %) was achieved by introducing trace Ce(III) (0.30 µM). OA was identified as an effective ligand activating Ce(III) by forming the Ce(III)-OA complex, which served as the catalytic active component to accelerate the decomposition of O 3 and H 2 O 2 to produce •OH and promote the co-degradation of refractory pollutant atrazine and ibuprofen. The remarkable catalytic activity of trace Ce(III) for peroxone reaction resulted from the efficient interconversion of Ce(III/IV) relying on both the favorable electron transfer from the ternary Ce(III)-OA-hydroperoxo complex to O 3 and the rapid reduction of Ce(IV) back to Ce(III) mainly by H 2 O 2 . Furthermore, the catalytic performance of Ce(III) for peroxone process outperformed Fe(II), Cu(II), and Co(II). This study puts forward an effective method to extrapolate the applicability of the peroxone (O 3 /H 2 O 2 ) process to the acidic range and enlightens the development of Ce-catalyzed peroxone processes.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tingjun Liu,Ziying You,Fangyuan Shen,Puying Yang,Junyu Chen,Shuhuai Meng,Chenglin Wang,Ding Xiong,Chengjia You,Zhenming Wang,Yu Shi,Ling Ye
Cranial bone defects remain a major clinical challenge, increasing patients’ life burdens. Tricarboxylic acid (TCA) cycle metabolites play crucial roles in facilitating bone tissue regeneration. However, the development of TCA cycle metabolite-modified biomimetic grafts for skull bone regeneration still needs to be improved. The mechanism underlying the release of TCA cycle metabolites from biomaterials in regulating immune responses and mesenchymal stem cell (MSC) fate (migration and differentiation) remains unknown. Herein, this work constructs biomimetic hydrogels composed of gelatin and chitosan networks covalently cross-linked by genipin (CGG hydrogels). A series of TCA cycle metabolite-coordinated CGG hydrogels with strong mechanical and antiswelling performances are subsequently developed. Remarkably, the citrate (Na3Cit, Cit)-coordinated CGG hydrogels (CGG-Cit hydrogels) with the highest mechanical modulus and strength significantly promote skull bone regeneration in rat and murine cranial defects. Mechanistically, using a transgenic mouse model, bulk RNA sequencing, and single-cell RNA sequencing, this work demonstrates that CGG-Cit hydrogels promote Gli1+ MSC migration via neutrophil-secreted oncostatin M. Results also indicate that citrate improves osteogenesis via enhanced histone H3K9 acetylation on osteogenic master genes. Taken together, the immune microenvironment- and MSC fate-regulated CGG-Cit hydrogels represent a highly efficient and facile approach toward skull bone tissue regeneration with great potential for bench-to-bedside translation.
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TALANTA
·
2024
·
IF 5.6
Peng’an Zhu,Jiangle Zhang,Jingjing Jin,Xing Huang,Xinfeng Zhang
Ferrous ion (Fe 2+ ) can indicate the redox situation of water and also plays an important role in maintaining the ecological balance of water bodies. However, due to the redox-active property of Fe 2+ , it is still a huge challenge to sensitively and accurately determine Fe 2+ especially in interstitial water. Herein, we prepared a ferrozine gel rod for valence fixation during sampling and subsequent smartphone-based detection of Fe 2+ . The electrode potential of the redox pair can be varied through the formation of Fe 2+ -ligand complexes, and when E complex was higher than E O 2 / OH − , the oxidation of Fe 2+ by O 2 was hindered, thus achieving the valence fixation of Fe 2+ . Six ligands were screened, and it was found that ferrozine could effectively increase the redox potential after complexing with Fe 2+ , and also exhibits an obvious color change while fixing the valence of Fe 2+ . To facilitate Fe 2+ detection, a cross-linked porous polymer gel rod prepared by acrylamide and sodium alginate was used to encapsulate the ferrozine molecules. The ferrozine gel rod enabled fixation the valence of Fe 2+ longer than 30 days, and the resulted purple-red color was pictured and analyzed by a smartphone. Ultimately, the developed ferrozine gel rod sensing system was able to achieve sensitive and linear detection of Fe 2+ in the range of 1–200 μM with the limit of detection as low as 0.33 μM, and it also exhibited excellent selectivity and anti-interference ability. The accuracy and reliability of the method was verified by the determination of Fe 2+ in spiked water samples and certified standard reference water samples. Finally, the ferrozine gel rod sensing system was successfully applied to in-situ detection of Fe 2+ in interstitial water, overlying water and upper water of lake and river. This facile system that enabled valence fixation and fast detection is promising for detection of Fe 2+ in environmental waters.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Rui Feng,Zhou Fang,Wei Wang,Tianbo Li,Xiaoyan Hu,Xinlong Yan,Zhongdong Zhang
Direct hydroxylation of benzene to phenol is an environmentally friendly strategy to produce phenol compared with the conventional process. In this work, vanadium-modified titanium silicate-1 (TS-1) with enhanced Lewis acid and charge density were prepared as catalysts for efficient hydroxylation of benzene to phenol in the presence of hydrogen peroxide as an oxidant under mild conditions. The hierarchical TS-1 zeolites with a high framework Ti content were synthesized in the presence of NH4HCO3, and then vanadium doping was used to change the acidity and charge density. It was found that NH4HCO3 favored the titanium substitution of framework sites and nanocrystal stacking of TS-1. Vanadium doping increased the amount of Lewis acid sites and the charge density associated with the framework Ti. The enhancement in acid and electron characteristics boosted the intrinsic catalytic reactivity of Ti-OOH species, which further improved the performances toward benzene hydroxylation. The presented strategy and mechanistic results clarified the relationship between the structure and acidity in TS-1 zeolite. It was also verified that hydroxyl radicals (•OH) rather than superoxide radicals (•O2–) were the reactive agents responsible for the consecutive selective oxidation of benzene.
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Micromachines
·
2024
·Vol. 15
·期 7
·828
·
IF 3
Ji Li,Yu Wang,Xinyuan Pei,Chunhe Zhou,Qing Zhao,Ming Lu,Wenjuan Han,Li Wang
The ZnMn2O4/V2CTxcomposites with a lamellar rod-like bond structure were successfully synthesized through high-temperature calcination at 300 °C, aiming to enhance the Li storage properties of spinel-type ZnMn2O4anode materials for lithium-ion batteries. Moreover, even though the electrode of the composites obtained at 300 °C had a nominal specific capacity of 100 mAh g−1, it exhibited an impressive specific discharge capacity of 163 mAh g−1after undergoing 100 cycles. This represents an approximate increase of 64% compared to that observed in the pure ZnMn2O4electrode (99.5 mAh g−1). The remarkable performance of the composite can be credited to the collaborative impact between ZnMn2O4and V2CTx, leading to a substantial improvement in its lithium ion storage capacity. Therefore, this study offers valuable insights into developing cost-effective, safe, and easily prepared anode materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hongfan Huang,Haihui Wu,Jiqing Zhang,Tao Zou,Ende Feng,Xuekun Sui,Wenjing Zhang,Bao Liu,Liu Yang,Xiaohui Guan,Penggang Yin,Guangsheng Wang
Exploiting high-quality cathode materials and optimizing their electrochemical performance for aqueous zinc-ion batteries (AZIBs) is of prominent significance for the advancement of charge storage devices. Herein, a novel zeolitic imidazolate framework assisted synthesis method has been proposed for the first time to prepare C and N co-doped Mn 2 O 3 /Co 3 O 4 cathode (C/N-Mn 2 O 3 /Co 3 O 4 ) with unique hollow hexahedron structure. Theoretical, simulative, and experimental results all reveal that primarily benefiting from synergistic effects, the drawbacks of low structural stability and electrical conductivity for Mn 2 O 3 , and the shortcomings of inferior electrochemical activity and cycling stability for amorphous Co x O y (A-Co x O y ), could be effectively compensated. In addition, the unique hollow hexahedron structure could provide abundant active sites and electron transfer paths, which is conducive to the enhancement of electrochemical activity and kinetics. The zinc battery utilizing C/N-Mn 2 O 3 /Co 3 O 4 as cathode exhibits a high specific capacity of 355.9 mAh·g −1 at 0.1 A·g −1 , which is much higher than that of A-Co x O y . After dozens of cycling at different current densities, the specific capacity could be retained, indicating superior rate performance. Moreover, the specific capacity presents no decrease during initial 600 repeated charge/discharge cycles, suggesting admirable cycling stability. Additionally, the electrochemical kinetics and energy density of the AZIBs are also distinctly improved.
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